IP PortfolioPhysical IPi/o pads
of_io_xtal
Crystal oscillator I/O cell
Maturity plannedTargets ASIC (CMOS) onlyDifficulty HardPriority 1
Pierce oscillator pad pair for 32.768 kHz and 4 to 50 MHz crystals with programmable drive and bypass mode for an external clock.
Planned. This block is specified in the catalog with its interfaces and targets. No implementation exists yet; the skeleton command below generates a lint-clean shell with its ports and registers.
Interfaces
| Port | Direction | Kind | Width | Notes |
|---|---|---|---|---|
| xin | inout | analog | 1 | |
| xout | inout | analog | 1 | |
| clk_out | out | clock | 1 |
Standards
No external standard applies.
More in i/o pads
| ID | Block | Maturity |
|---|---|---|
| of_io_gpio | General-purpose I/O cell | planned |
| of_io_failsafe | Fail-safe and 5 V tolerant I/O | planned |
| of_io_od | Open-drain I2C / I3C I/O | planned |
| of_io_lvds | LVDS I/O cells | planned |
| of_io_cml | CML / LVPECL clock I/O | planned |
| of_io_sstl | SSTL / POD memory I/O cells | planned |
| of_io_analog | Analog pad | planned |
| of_io_rf | RF pad | planned |
| of_io_power | Power and ground pads | planned |
| of_io_corner_filler | I/O corner and filler cells | planned |